Holder

Abstract

Holder (1) for releasably connecting a handle to a tool (2), in which the holder (1) comprises a space (3) in which a handle end is introducible, in which this space (3) comprises a wall surface with one or more projecting cutting elements (5a, 5b) for cutting complementary screw thread by means of which the one or more cutting elements (5a, 5b) are releasably connectable, in which the holder (1) comprises a coupling portion (6) comprising the one or more cutting elements (5a, 5b) and a retaining portion (7), in which the coupling portion (6) is made of a first material comprising plastic and the retaining portion (7) is made of a second material, in which the hardness of the first material is greater than the hardness of the second material.

The invention claimed is: 
     
       1. A holder for releasably connecting a handle to a tool, in which the holder comprises a space in which a handle end of a handle is rotatably introducible along essentially an axis of rotation to connect the handle to the holder, in which the space comprises a wall surface which extends around the axis of rotation, and the wall surface comprises one or more projecting cutting elements for cutting complementary screw thread by means of which the one or more cutting elements are releasably connectable during the rotary introduction of a handle end into the space, so that both an essentially smooth handle end and a handle end comprising external screw threads are releasably connectable to the holder,
 wherein the holder comprises a coupling portion comprising the one or more cutting elements and a retaining portion for retaining the coupling portion, in which the coupling portion is made of a first material and the retaining portion is made of a second material, with the hardness of the first material being greater than the hardness of the second material and with the second material substantially comprising plastic, and 
 wherein the coupling portion comprises an inner surface comprising the one or more projecting cutting elements, in which the inner surface at least partly forms said wall surface of the space, and in that the coupling portion comprises an outer surface which is situated opposite the inner surface, in which the outer surface comprises one or more outwardly pointing protrusions, and in which the retaining portion bears against the outer surface of the coupling portion in such a way that the retaining portion at least partly encloses the one or more protrusions, and 
 wherein the coupling portion comprises an inner surface comprising the one or more projecting cutting elements, in which this inner surface substantially forms the wall surface of said space and the retaining portion largely extends around the coupling portion, viewed along the axis of rotation, and the coupling portion substantially forms the space, the inner surface substantially forms the wall surface and the coupling portion, viewed along the axis of rotation, comprises an opening on one side, via which the space is accessible, and a bottom on the other side, so that the space is substantially delimited by the bottom and the inner surface, in which the bottom comprises one or more outwardly pointing limbs, in which the retaining portion bears against this bottom and at least partly encloses the one or more limbs. 
 
     
     
       2. The holder according to  claim 1 , characterized in that the second material comprises substantially polypropylene. 
     
     
       3. The holder according to  claim 1 , characterized in that the size of the retaining portion, viewed along a plane perpendicular to the axis of rotation, along a straight line which intersects the axis of rotation and in the vicinity of a said protrusion of the outer surface of the coupling portion, essentially corresponds to the corresponding size of said protrusion. 
     
     
       4. The holder according to  claim 1 , characterized in that one or more of the protrusions extend substantially along a plane which makes an angle with the axis of rotation. 
     
     
       5. The holder according to  claim 1 , characterized in that one or more of the protrusions, viewed along the axis of rotation, have a T shape, with a part of each of the one or more protrusions extending substantially along the axis of rotation. 
     
     
       6. The holder according to  claim 1 , characterized in that the coupling portion comprises an inner surface comprising the one or more projecting cutting elements, in which this inner surface substantially forms the wall surface of said space and the retaining portion largely extends around the coupling portion, viewed along the axis of rotation. 
     
     
       7. The holder according to  claim 1 , characterized in that the space is substantially conical, the holder comprising an opening via which the space is accessible, with the diameter of the space, viewed along the axis of rotation, increasing in the direction of the opening. 
     
     
       8. The holder according to  claim 1 , characterized in that the wall surface of the space comprises one said cutting element, and in that the cutting element is an internal screw thread. 
     
     
       9. The holder according to  claim 1 , characterized in that said one or more cutting elements are several teeth which together form at least a segment of an internal screw thread. 
     
     
       10. The holder according to  claim 1 , characterized in that the first material has a hardness of at least 80 Shore D. 
     
     
       11. The holder according to  claim 10 , characterized in that the first material substantially comprises polycarbonate or metal. 
     
     
       12. A tool comprising a holder according to  claim 1 , in which the tool comprises a working element and a coupling piece which carries the working element, in which the coupling piece is made of a material comprising substantially plastic, in which the melting point of the material of the coupling piece essentially corresponds to the melting point of the second material, in which the coupling piece is connected to the retaining portion of the holder, and in which the holder is friction welded to the coupling piece at the location of its retaining portion. 
     
     
       13. The tool according to  claim 12 , characterized in that the material of the coupling piece essentially corresponds to the second material. 
     
     
       14. A tool comprising a holder according to  claim 1 , wherein the tool comprises a working element and a coupling piece which carries the working element, in which the coupling piece is made of a material comprising substantially plastic, in which the coupling piece is the retaining portion of the holder. 
     
     
       15. A method for manufacturing a tool comprising a holder, wherein:
 the holder releasably connects a handle to the tool, the holder comprising: 
 a space in which a handle end of the handle is rotatably introducible along essentially an axis of rotation to connect the handle to the holder, the space comprising a wall surface which extends around the axis of rotation, the wall surface comprising one or more projecting cutting elements for cutting complementary screw thread by means of which the one or more cutting elements are releasably connectable during the rotary introduction of a handle end into the space, so that both an essentially smooth handle end and a handle end comprising external screw threads are releasably connectable to the holder, 
 a coupling portion comprising the one or more cutting elements and a retaining portion for retaining the coupling portion, wherein the coupling portion is made of a first material and the retaining portion is made of a second material, with the hardness of the first material being greater than the hardness of the second material and with the second material substantially comprising plastic, the coupling portion comprising an inner surface comprising the one or more projecting cutting elements, wherein the inner surface at least partly forms said wall surface of the space, the coupling portion comprising an outer surface which is situated opposite the inner surface, the outer surface comprising one or more outwardly pointing protrusions, wherein the retaining portion bears against the outer surface of the coupling portion in such a way that the retaining portion at least partly encloses the one or more protrusions, 
 the tool comprises: 
 a working element and a coupling piece which carries the working element, wherein the coupling piece is made of a material comprising substantially plastic, wherein the melting point of the material of the coupling piece essentially corresponds to the melting point of the second material, 
 wherein the coupling piece is connected to the retaining portion of the holder, and 
 wherein the holder is connected to the coupling piece at the location of its retaining portion by means of friction welding.